Cut-off valve



J. GRAHAM.

GUT-OPP VALVE.

(No Modl.)

I, /ll/ vll/111111111111111! Patented Aug. 28, 1883.

Invert/or:

.Hit/194335,85;

(No Model.) 2 Sheets-Sheet 24 J. GRAHAM.

GUT-UFF VALVE.

No. 283,773.' Paten'tedAug. 28, 1883.

UNITED STATES PATENT OFFICE.

JOHN GRAHAM, OF CHICAGO, ILLINOIS.'

CUT-OFF VALVE.

SPECIFICATION forming part of Letterslatent No. 283,773, dated August 28, 188.3.

Application filed February 23, 1883.

To @ZZ whom. t may concern:

Beit known that I, JOHN GRAHAM, residing at Chicago, in the county of Cook and State lof Illinois, and a citizen of the United States, have invented a new and useful Improvement in Cut-Off Valves, of which the following is a full description, reference being had to the accompanying drawings, in which- Figure l is a side view; Fig. 2, a horizontal section of Fig. l; Figs. 3 and 4, details showing the slides used for moving the valves 5 Fig. 5, side view of a slightly-modiiied form of the cut-off; Fig. 6, a horizontal section of Fig. 5', Figsf? and 8, details.

rIhe object of this invention is to improve the construction and operation of cut-offs for water-service pipes generally, and to so arrange the valves and their parts that when the cut-off is either open or closed water from the pipe connecting with the main cannot flow,

through and out at the waste-pipe in any position in which the valves may be placed; and it consists in the several improvements and combinations of parts hereinafter described an d claimed as new.

In the drawings, A indicates the body of the cut-off; B, coupling for connecting the water pipe leading from the main; O, coupling for a stand or service pipe; D, waste-pipe; E, stuffing-boxes; F, weighted lever; F7 slot or opening in lever Fi G, crankarin; H I, shafts; J, valveseat; K, valve-cages; a, crank-pin on, or portion of shaft H; b, valve slide or support,

c, fork or opening in valve-slide; d, waste-pipe valve; e, ycrank-pin on, or part of shaft I; f, valve support or slide; g, fork or opening in the slide f h, valve for shutting-pff the flow of water, z, springs, j, valve-stem; k, pin on crank G; b f, valve stems or couplings.

This device is, by preference, made of brass, with the exception ofthe weighted lever, which may be of cast-iron, and the central portion or case, A, is made in the forni shown, and it is provided with the usual connections or coup` lings, B C, and a waste-pipe, D.

The part A is provided with shafts H and I, the shaft H operating the waste-valve d and the shaft I the water or supply valve 71,.

The valve-seat J and its cage K for the valve d, as seen in Fig. 2, are of a single piece screwed into the interior of the central part, A, while the valve-seat of the valve h is formed by the (No model.)

'end of the said part A, the cage of the valve 2, are supported against the water-pressure by slides b f, which are fluted or cut away to form water-passages along their length, as shown. The valves are prevented from getting out of operative position by their stems j, springs i, and cages K.

The inner ends of the shafts II I are bent or otherwise formed, so as to have a crank action, the crank a working in the slot or opening c of the slide b, so as to force the valve d open, while the water-pressure and spring t hold it in the opposite direction, or closed. The crank e of the shaft I operates the slide f to open the valve h against the pressure of the water, while the water-pressure and the spring z' reseat the valve when the pressure of the crank e is removed.

The shafts II I are both operated by the lever F, andin the form shown in Fig. 2 they are rotated or rocked in the same direction. The connection of the weighted lever F with the shaft I is direct, while its connection with the shaft II is by the lever or crank-arm G, the pin k, and slot F', and in this form the waste-valve d is operated against the pressure of the water by the force applied to lift the weight, and is held closed by the weight when it is down, while the valve h is held open when the weight is down, the position of the valves, as shownr at Fig. 2, beingthat which they occupy when the weighted lever is in the position shown by the dotted lines of Fig. 1, and in operation the crank yor crank-pin a does not commence to press against the slide b until the crank-arm G is in the position indicated by the dotted lines of Fig. l, from which point its upward movement tends to press the valve d inward and to open the passage to the waste-pipe D. It will also be seen that when the weighted lever is raised to the horizontal position indicated the valve h has become seated, so that IOO By this arrangement it is not possible to open l and in respect to the movement of the shafts 4o the waste-valve before the supply-valve is closed, and therefore no water can flow through the casing and thus produce an unnecessary 5 or linjurious waste of water, as only that can escape whichis in the stand-pipe or servicepipe connected with the coupling C, and, as will be further seen, when the lever F is in the half-way position both valves are closed, so that with a stoppage at this point water will neither flow in nor out, as is the case with shut-off cocks of an ordinary construction, where the half-way stoppage permits the water to flow right through from the supply into the waste.

lThe slides `b f are opened at their connec.

tions c y with the shafts, so that they are only operated inone direction by the crank, and

this form is preferred Where both valves are 2o arranged with the water-pressure in the direction of seating or closing them, as then'no special adjustment of length is required to give the valves their seating or to compensate for wear.

The form shown in Fig. 5 is modified in respect to the rocking or special rotation of the shafts, as in this form, by turning the crankarm G over, the valve-shafts are made to rock in opposite directions, and in this form the 3o valve-stems b f are passed through the valves and directly attached to the cranks a e, so as f to give the valves a positive movement in both directions. The forms of the valve are also so modied as to dispense with the cages K and springs i; but the operation of the two valves in respect'to opening and closing is the same, and also in respect to the water from the main passing directly through and out at the waste-pipe in any position of the valves,

H I by the weighted lever.

The central portion of the case A of Fig. 6 is to be provided with pipes or couplings B and D, the salneas in Fig. 2. rIhe stuffingboxes E` being of the ordinary construction, are not described at length, but their construction will be apparent from the drawings.

As described and shown, the supply-valves are open when the weight is down. It will, however, be understood that by turning the shafts H I half` around the operating position of the lever F will bevreversed, as then the supply-valve `h will be open when the lever is at its highest point and the, waste -valve d closed. i l l What I claim as new, and desire to secure by Letters Patent, is-

l. The combination of the shaft H, arm G, shaft I, and valves d and h, respectively, connected with the said shafts, with the slotted 6o actuating lever or arm F, connected with the shaft I, and arm G, substantially as and for the purpose described.

2. The combination of the shafts H I, having eccentrics or cranks on their inner ends, with the valves d h and their connections or couplings, substantially as described.

3. The combinationV of the'shafts II and I, having eccentrics or cranks a and e, arranged and combined with supply and waste valves 7o and their connections or couplings, and an operating-lever to close or open either valve be- `fore the other is opened or closed, substantially as specified.

JOHN GRAHAM.

Witnesses:

O. W. BOND, ALBERT H. ADAMS. 

